Malicious PDF — malware analysis report

Static analysis result for SHA-256 39eb57690733c79f…

MALICIOUS

PDF

74.0 KB Created: 2021-03-16 08:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bde993f01b513ac4b14b59c43f5dca96 SHA-1: d450969ed57e4593805fb367933dfd4109d3e4f0 SHA-256: 39eb57690733c79fbd3a4a41ef5e1efda1bc7255f1ca388bef93393b1fe2788b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many of which are hosted on disposable domains or subdomains, suggesting a link farm designed to distribute malicious content. The heuristic 'ML_NYX_PDF_MALICIOUS' strongly indicates malicious intent, and the 'SE_INVOICE_LURE' heuristic suggests a pretext for user interaction. The document body, though heavily obfuscated, contains keywords related to financial transactions, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/wix?keyword=what+is+cancellation+of+deed+to+secure+debt PDF link annotation
    • http://sewamagiz.66ghz.com/32014403655.pdfIn PDF document text
    • https://cdn.sqhk.co/dojagomudek/fhfjdgh/59123453992.pdfIn PDF document text
    • https://cdn.sqhk.co/gizetinediz/cLUMgff/82300401496.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/ShirYDn/46173793196.pdfIn PDF document text
    • http://labiluwewinedu.22web.org/mexagufokuj.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/chhjehc/8434617665.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/ehl4SdY/story_saver_for_whatsapp_and_instagram_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/hgpYgj7/96245657342.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/63ovgjg/vibowimefopuderi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/pakedaxoxuroxevaxenapefu.pdfIn PDF document text
    • http://vumigewinumuzi.epizy.com/85690084434.pdfIn PDF document text
    • http://dudoluv.rf.gd/csi_ny_the_lying_game_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/wugobasutofajasuposubis.pdfIn PDF document text
    • http://renunuxuxalebav.epizy.com/83279064344.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_89664a25362040db88c387ccd635eeda.pdf?index=trueIn PDF document text
    • http://tatasoge.epizy.com/tasivolobekusafovug.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/66335830803.pdfIn PDF document text
    • https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_94acd23bcce04b709240e6d19fb4c816.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/majivaxizalef.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 5260 bytes
SHA-256: aa5dc67ddcbe47eaf726176f215c818917f32f0ab21066a646c2e47745ba804a
font_01_sfnt_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 11452 bytes
SHA-256: 8823ae169323d0673f0d460e93c15c1cf2d4cec0636225687d22004c5ee56961

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